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Author Topic: MCI 5C Driveshaft  (Read 1357 times)
Tom Y
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80 5C With Cummins L10 in Progress




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« on: April 17, 2011, 08:29:55 AM »

Heres a pic of a 5C driveshaft fro a 8v71 with a spicer 4 speed. Note the yokes out of phase. This is to inform 5C owners what they have.  Tom Y
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Tom Yaegle
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« Reply #1 on: April 17, 2011, 08:31:16 AM »

Heres why, note the spline.
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Tom Yaegle
bevans6
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1980 MCI MC-5C




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« Reply #2 on: April 17, 2011, 10:00:03 AM »

I wonder if that is to accomodate the fact that the engine is installed at an angle to the rear end?  It has about a 10 degree offset from 90 degrees fore-aft.

Brian
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1980 MCI MC-5C, 8V-71T from a M-110 self propelled howitzer
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1978 Lola T440 Formula Ford
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lostagain
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« Reply #3 on: April 17, 2011, 11:47:18 AM »

So it looks like there is only one way to slip it back on. That's a good thing. Mine is out of phase like this too, because of the angles between engine and drop box.

JC
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JC
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1977 MC5C, 6V92/HT740
Dave5Cs
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1979 MCI MC5Cs 6V-71 HT-740 Allison, Roseville, CA




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« Reply #4 on: April 17, 2011, 04:39:12 PM »

OK but I don't see where they compensated for the weight loss of the other missing spline on the shaft or maybe inside. I don't feel any verb-rations in mine or is it different on 6v- 71 and Automatic MT 654

Dave
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« Reply #5 on: April 17, 2011, 08:30:12 PM »

  The missing spline is compensated for by the bigger spline of the other shaft. When the two are slid together there are no voids.

 
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Tom Y
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« Reply #6 on: April 18, 2011, 03:23:29 AM »

Dave, If you look at yours and it is out of phase I would think it the same.  Tom
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Tom Yaegle
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1979 MCI MC5Cs 6V-71 HT-740 Allison, Roseville, CA




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« Reply #7 on: April 18, 2011, 07:12:49 AM »

yep must be because it is also out of Phase about 10 degrees.
Thanks Tom

Dave
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« Reply #8 on: April 18, 2011, 09:19:48 AM »

  With the amount of torque going through that shaft, its surprising they arent using a CV joint. I thought the angle was only 5 degrees. 10 degrees is actually quite high. Good idea to give these MC5 drive shafts some extra attention. Dont wait until its thumpin. And dont keep going if it starts.
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Tom Y
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« Reply #9 on: April 18, 2011, 01:30:05 PM »

I did not think it was 10 degrees??? I had on mine 3.89 degrees of engine out of parallel to bus. Not sure now??
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Tom Yaegle
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